Abstract：
The ecological impact of emerging contaminants (ECs) in aquatic environments has raised concerns, particularly with regards to urine as a significant source of such contaminants in wastewater. The current investigation used the UV/Peracetic Acid (UV/PAA) processes, an innovative advanced oxidation technology, to effectively separate two emerging pollutants from urine at its source, namely, ciprofloxacin (CIP) and bisphenol A(BPA). The research findings demonstrate that the presence of the majority of characteristic ions has minimal impact on the degradation of ECs. However, in synthetic hydrolyzed urine, only NH4+ inhibits the degradation of two types of ECs, with a more pronounced effect observed on CIP degradation compared to BPA.The impact of halogen ions, specifically Cl- and I-, on the degradation of CIP in synthetic hydrolyzed urine was a complex phenomenon. When these two halogen ions are present individually, the generation of reactive halogen species (RHS) within the system enhances the degradation of CIP. However, when both types of ions coexist, the formation of diatomic radical species partially inhibits degradation. In terms of BPA degradation, while the production of reactive chlorine species (RCS) to some extent hinders the reaction rate, the generation of reactive iodine species (RIS) promotes the overall process. CIP undergoes fragmentation of the piperazine and quinoline rings, decarboxylation, defluorination reactions, as well as substitution reactions, leading to the formation of products with simplified structures. The degradation of BPA occurs gradually through hydroxyl and halogen substitution as well as isopropyl cleavage. The preliminary toxicity analysis confirmed that the presence of halogen ions in urine resulted in the formation of halogenated products in two types of ECs, albeit with an overall reduction in toxicity. The UV/PAA processes was considered to be an effective and relatively safe approach for the separation of ECs in urine.
摘要：
水生环境中新兴污染物(ECs)的生态影响引起了人们的关注，特别是关于尿液作为废水中此类污染物的重要来源。当前的调查使用UV/过乙酸（UV/PAA）工艺，一种创新的高级氧化技术，有效地从尿液中分离出两种新出现的污染物，即,环丙沙星（CIP）和双酚A（BPA）。研究结果表明，大多数特征离子的存在对EC的降解影响最小。然而,在合成水解尿液中，只有NH4+抑制两种类型的ECs的降解，与BPA相比，对CIP降解的影响更为明显。卤素离子的影响，特别是Cl-和I-，合成水解尿液中CIP的降解是一个复杂的现象。当这两种卤素离子单独存在时，系统内反应性卤素物质（RHS）的产生增强了CIP的降解。然而,当两种离子共存时，双原子自由基物种的形成部分抑制了降解。在BPA降解方面，而活性氯物种（RCS）的产生在一定程度上阻碍了反应速率，反应性碘物质（RIS）的产生促进了整个过程。CIP经历哌嗪和喹啉环的片段化，脱羧,脱氟反应,以及取代反应，导致形成具有简化结构的产品。BPA的降解通过羟基和卤素取代以及异丙基裂解逐渐发生。初步的毒性分析证实，尿液中卤素离子的存在导致在两种类型的EC中形成卤化产物，尽管毒性整体降低。UV/PAA工艺被认为是分离尿液中ECs的有效且相对安全的方法。
